package cn.itcast.usermanager.view;

import cn.itcast.usermanager.pojo.User;
import cn.itcast.usermanager.utils.Constants;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.joda.time.DateTime;
import org.springframework.web.servlet.view.document.AbstractXlsView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.List;
import java.util.Map;

/**
 * Created by zy on 2018/1/15.
 */
public class UserListView extends AbstractXlsView {
    @Override
    protected void buildExcelDocument(
            Map<String, Object> model, Workbook workbook, HttpServletRequest request, HttpServletResponse response)
            throws Exception {

        // 从model中获取用户集合对象
        List<User> userList = (List<User>) model.get("userList");

        // 自定义视图
        // 创建Excel的sheet
        Sheet sheet = workbook.createSheet("会员列表");

        // 创建标题行
        Row header = sheet.createRow(0);
        header.createCell(0).setCellValue("ID");
        header.createCell(1).setCellValue("用户名");
        header.createCell(2).setCellValue("姓名");
        header.createCell(3).setCellValue("年龄");
        header.createCell(4).setCellValue("性别");
        header.createCell(5).setCellValue("出生日期");
        header.createCell(6).setCellValue("创建时间");
        header.createCell(7).setCellValue("更新时间");

        // 填充数据
        int rowNum = 1;
        for (User user : userList) {
            Row row = sheet.createRow(rowNum);
            row.createCell(0).setCellValue(user.getId());
            row.createCell(1).setCellValue(user.getUserName());
            row.createCell(2).setCellValue(user.getName());
            row.createCell(3).setCellValue(user.getAge());
            String sexStr;
            if (user.getSex() == 1) {
                sexStr = "男";
            } else if (user.getSex() == 2) {
                sexStr = "女";
            } else {
                sexStr = "未知";
            }
            row.createCell(4).setCellValue(sexStr);
            row.createCell(5).setCellValue(new DateTime(user.getBirthday()).toString(Constants.DATE));
            row.createCell(6).setCellValue(new DateTime(user.getCreated()).toString(Constants.DATE_TIME));
            row.createCell(7).setCellValue(new DateTime(user.getUpdated()).toString(Constants.DATE_TIME));

            rowNum++;
        }
        // 设置相应头信息，以附件形式下载并且指定文件名
        response.setHeader("Content-Disposition",
                "attachment;filename=" + new String("会员列表.xls".getBytes(), "ISO-8859-1"));
    }
}
